UBS's sponsorship of the "rehang" of the art collection at London's Tate Modern gallery, including Marcel Duchamp's infamous porcelain Fountain, has cast a spotlight on the huge numbers of paintings and other works of art owned by the global banks.

Sir Nicholas Serota, the Tate director, said: "UBS has a fine corporate collection." A few of these works will be displayed at the Tate, allowing UBS to show off some of the more than 900 paintings, photographs, drawings and sculptures, mostly from the second half of the 20th century, that it has built up over the past 30 years.